Method of channeling soles



April 22, 1930. w. s. SHAFT 1,755,843

METHOD OF CHANNELING SOLES Filed Jan. 25, 19257 2 Sheets-Sheet l April 22, 1930. w. s. SHAFT 1,755,843

METHOD OF CHANNELING SOLES Filed Jan. 25, 1927 2 Sheets-Sheet 2 B H h` 4 Illllllllmlllllllll 31a/ovulo@ WILL/6 a. SHAFT Patented Apr. 22, 1930 WILLIS S. SHAFT, OF FARIBAULT,

MINNESOTA, ASSIGNOR TO SHAFT-PIERCE SHOE COMPANY, OF FARIBAULT, MINNESOTA METHOD OF CHANNELNG SOLES Application filed January 25, 1927. Serial No. 163,492.

This invention relates to a novel method for channeling shoe soles and more particularly to a. method for channeling and forming combination inner and middle soles utilized in the so Called double welt process of making shoes.

The primary object of the present invention is the provision of a novel method of forming a combination inner and middle sole 13 by beveling the edge of that portion of the leather which forms the inner sole so as to allow the upper to be pulled under farther from the edge and thus save material on that portion of the leather forming the middle 15 sole, andto save in the width and length of the outer sole.

Another object of the invention is the provision of a novel means associated with the usual type of sole channeling means, such as shown in the Letters Patent 1,080,705 issued to F. E. Bertrand on June th, 1912,

for channeling leather to form a combination inner and outer sole having the edge thereof beveled whereby such portion of the 25 leather will be extremely thin.

A further object of the invention is the provision of a novel work disk for taking the place of the usual work table for channeling shoes, the disk having its upper face concaved, whereby the outer edge of the leather can be elevated above the body of the leather, thereby permitting the knife to thin or bevel the edge of the leather forming the middle sole.

A further object of the invention is the provision of a novel channel presser foot for cooperating with the work disk for holding the edge of the middle sole against the beveled or inclined face of the disk during 4o the cutting stroke of the channel knife, thereby insuring the proper channeling and beveling of the middle sole.

A further obj-ect of the invention is the provision of a novel feeder foot operating in conjunction with the knife for moving the leather or work along the disk on the inoperative stroke of the knife.

A further object of the invention is the novel method of" channeling soles consisting of placing the sole upon a beveled face of a work disk, holding the sole in contact with the beveled face during the operative stroke of the channel knife and moving the sole over the disk during the inoperative stroke of the channel knife and while the foot is in a 5,5 raised position.

lVith these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described and s3,- claimed, and illustrated in the accompanying drawings, in which drawings z- Figure l is a fragmentary side elevation of a channeling machine showing my invention incorporated therewith and illustrating the operative position of the presser footand channeling knife,

Figure 2 is al section taken on the line 2 2 of Figure l looking in the direction of the arrows showing the operative position of the 7o presser foot and channeling knife,

Figure 3 is a diametric section through the work disk taken on the line 3 3 of Figure 2 looking in the direction of the arrows showing the sole on the disk in dotted lines and illustrating the knife during the cutting stroke,

Figure 4 is a section taken on the line 4-4 of Figure 2 looking in the direction of the arrows showing the position of the presser gg foot during the operative' stroke of the cutting knife,

Figure 5 is a fragmentary perspective view showing the work disk and sole in section and illustrating the position of the knife durgg ing the working stroke thereof,

Figure 6 is an enlarged fragmentary section through the work disk and channeling knife and showing the knife forming the channel, and

Figure 7 is a fragmentary perspective view showing the work disk and sole in section and illustrating the position of the presser foot during the operative stroke of the knife.

Referring to the drawings in detail, Wherein similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates a sole channeling machine which forms the subject matter of an independent application for 'Iii Patent Ser. No. 184,143, filed April 15, 1927, and B the sole which is channeled thereon. The sole B forms the subject matter of an independent application for patent filed J anuary 25, 1927, Serial No. 163,490 and will notbe describe-d in detail, but it is to be noted that the same includes integral inner and middle soles and 11 and that the outer or middle sole 10 is extended beyond the marginal edge of the inner sole as at 12. rThe machine and the method of channeling soles provides a novel channel 13 for receiving the upper and lining and also provides a bevel on the upper face of the extension or flap on the middle sole as indicated by the reference character 14. It is to be also noted that the peripheral edge of the inner sole 11 is also beveled as at 15 and that this bevel extends inwardly toward the channel 13.

As stated the machine A is of the general type shown in Letters Patent to Bertrand No. 1,030,705, issued on June 25, 1912, and also in the Letters Patent of Great Britain to Albert Gabel 3,986 February 17, 1910, and includes the usual vertically movable post having my novel work disk 21 which forms a salient feature of this invention. The disk 21 has its lower face provided with a depending axially disposed boss 22 by means of which the same is attached to the vertically movable support or post 20. Tt has its upper face at the edge thereof beveled inwardly as at 23. Thus the upper face of this disk is of a substantially concaved shape. The disk supports the work and is raised and lowered by suitable mechanism for bringing the work or stock into and out of operative position relative to vthe channeling mechanism. Arranged at one edge of the disk 21 is the oscillating arm 24, which carries a knife block 25 for the reception of the channel knife 26. This knife also forms a salient feature of the invention and forms the subject matter per se of another independent application for patent i'iled January 25, 1927, Serial No. 163,491. This knife extends inwardly toward the disk and overlies the beveled edge thereof and is disposed at one side of the diametric center of the disk. y

This knife 26 includes a shank 26 which is detachably fitted within the knife block 25 and a forwardly extending blade 27 which is beveled toward the inner longitudinal edge thereof to provide a cutting edge 2S. The outer end of the blade 27 is likewise provided with a cutting edge 29 and this portion of the blade is beveled toward the back face or edge of the knife as at 30 so as to slightly spread the inner and outer soles 10 and 11 during the cutting stroke of the knife. Spaced from the cutting edge 29 of the knife 26 is an upwardly and inwardly inclined auxiliary cutting blade 31. This blade 31 has one end thereof facing the cuttinor edge 28 provided with a cutting edge, whi li is arranged at an angle of substantially forty-tive degrees to the edge 28. The auxiliary blade 31 narrows toward its cutting edge and the angle decreases toward the edge 28.

Arranged directly in front of the knife 26 and substantially at the dianietric center of the disk 21 is the feeder foot 32 for engaging the work or shoe sole. This feeder foot 32 is connected with the arm 24, whereby the knife and feeder foot work synchronously and in conjunction with one another. During the operating stroke of the knife when the saine swings toward the diametric center of the disk the foot barely hits trie upper face of the sole, but on the return inoperative stroke of the knife when the saine is moved away from the diametric center of the disk the foot engages the work for moving the same along the work disk 21.

On the other side of thefeeder foot 32 from the knife 26 is the channel presser foot 33 which also forms an important part of the invention. This presser foot 33 is provided with an attaching shank 34 which is connected with the vertically movable slide arm 35 yof the machine A. The foot 33 at'the lower end of the shank 34 is provided with a lateral ly inwardly directed foot portion 36 which has a beveled heel portion 37 which correspends to the bevel of the portion 23 of the disk 21.

This presser foot functions to hold the sole down against the bevel of the disk during the operating stroke of the knife which 'isures the proper cutting by the knife of the sole and the forming of the bevel 14 on the middle sole 10. Vhen the knife swings away from the sole the presser foot is raised so that the work can slide over the disk 21.

The improved process for forming the combination inner and middle sole with the beveled edge on the inner sole consists in placing the leather upon the table with its edge on the bevel 23 of the disk and the channeling knife is then set in operation. The knife then swings toward the disk and the presser foot 33 is forced downward and holds the leather against the bevel 23. The knife now forms the slit 13 and the cutting edge 29 extends inwardly of the slit forming the channel and the beveled edge 15. As the leather is held in an inclined position the knife cuts the extension 12 at an angle and bevels the upper face thereof and thus the edge of the middle sole is gradually tapered forming a thin flexible extension. The knife then swings away from the leather and the feeder foot carried thereby advances the leather so that the same will be in position for the next cutting stroke of the knife. When the knife starts to swing away from the work the presser foot will rise so as to allow the work to be released.

From the foregoing description, it can be seen that I have provided a novel method of forming a channel in combined inner and middle soles with the extension of the middle sole beveled outwardly to form a thin flexible portion.

Changes in details may be made without departing from the spirit or the scope of this invention, but what I claim as new is:

1. The process of forming a combination inner and middle sole and channeling the same comprising the supporting of the sole stock with a portion of its edge above the body thereof, holding said portion of the edge in said position against movement, cutting the margin of the sole and channeling the same,

and then releasing` the sole and advancing the same to a new position.

2. The process of forming a combination inner and middle sole and channeling the same comprising the su porting of the sole stock with a portion o its edge above the` body thereof, holding the stock in set position against movement, cutting the stock at the margin thereof while the same is being held, then releasing the stock and advancing the same to a new position.

3. The method of forming a combination inner and middle sole with the middle sole having a beveled extension comprising the supporting of the sole stock with a portion of its edge above the body thereof and at an angle thereto, holding this portion of said margin in set position against movement, cutting the stock inward of the margin at an angle to the vertical, and cutting the stock outward of the last mentioned cut and in a horizontal plane thereby forming an eXtension with a bevel thereon.

4. The method of forming a combination inner and middle sole having the middle sole extension provided with its face beveled toward its margin comprising the supporting of the sole stock with a portion of its edge above the body thereof and at an angle thereto, holding the margin of the sole stock in set position against movement, cutting the margin of the stock at an angle to a vertical plane inward of the edge thereof and simultaneously cutting the margin in a substantially horizontal plane to form an extension with a bevel thereon.

:5. The process of forming a combination inner and middle sole and channeling the same comprising the supporting of the solo stock with a portion of its edge above the b5 body thereof and at an angle thereto, releasably holding the sole stock in said position against movement, cutting the sole stock inwardly of the margin thereof and at an angle to the vertical, simultaneously cutting the sole stock in a horizontal plane at the inclined portion thereof, releasing the stock and advancing the stock to a new position for further cutting.

In testimony whereof I affix my signature.

D5 WILLIS S. SHAFT. 

